OBSERVATIONS ON A SALMON RIVER 



As they are constantly dying there is a 

 shower of food falling over the ocean floor 

 which joins the food that comes from the 

 littoral regions. It is stated that there is a 

 thick broth of food over wide areas of sea 

 bottom which can readily be obtained with 

 very little effort on the part of the fishes. 



The progress of large bodies of salmon 

 in the sea, judged by the catches in nets at 

 different stations, is said to be four or five 

 miles a day. They only travel in the day- 

 time; no salmon are taken in the nets at 

 night. 



After entering the river, these conditions 

 are changed for then the salmon travel 

 mostly by night. 



Previous to entering the pure fresh water 

 they remain for some time in the estuaries, 

 moving in and out on the tides and becom- 

 ing gradually acclimatized to the change 

 from salt to fresh water. 



A considerable portion of the salmon that 

 spawn before the rivers freeze return to the 



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